noun
custom; convention; common practice
Refers to established social customs, conventions, or habitual practices shared by a group or society.
その村には古くからの慣習が残っている。
Old customs remain in that village.
国
We will proceed according to international conventions.
noun, noun or participle which takes 'suru'
becoming accustomed (to)
Archaic use as a noun or suru-verb meaning the process of getting used to something. Modern Japanese prefers 慣れる or 慣らす.
古い文献では「慣習する」という表現が見られる。
In old texts, the expression 慣習する can be found.